EXPANSION CHAMBER FOR FLUID MEDIUM WITH PROTECTED BELLOW Russian patent published in 2019 - IPC F04D13/10 F04B17/03 E21B43/12 

FIELD: machine building.

SUBSTANCE: group of inventions generally relates to submersible pump systems and, in particular, to an expansion system for lubricating an engine. Electric submersible pump system comprises engine filled with lubricant. Engine drives the pump. There is expansion chamber for fluid medium connected with engine. Expansion chamber comprises outer housing, top support, one or more outer holes extending through outer housing to borehole. Sealing chamber is arranged in outer housing. It is located in external housing, contains open proximal end attached to upper support, and closed distal end, made with possibility of movement inside external housing. Bellows is enclosed inside the sealing chamber. Inner part of bellows communicates with engine. Bellows comprises a proximal end connected to an upper support, and a distal end movable inside the sealing chamber.

EFFECT: technical result is higher reliability of system operation.

16 cl, 4 dwg